[JohnJL]

Thanks, that's fantastically helpful!

Also have to thank John Dougherty and Hans Pedersen who have been answering questions by phone and email over the past week.

I had an interesting discussion with the Supercharger retailer yesterday. Went something like this;

Me: "Any ideas why I'm getting 10lbs boost max? The supercharger specs show at that rpm it should be putting out enough air to get 15lbs?"

Hans: "Its not unusual to see 4 or 5 pounds less than calculated if you have good flowing heads and cams. Its not the boost level you should care about, its the additional volume of air you are able push into the cylinders. That's assuming you have no leaks or restrictions. You can easily increase your boost level by using smaller ports and valves or a more tame cam, but that's not what you're trying to achieve. When you are measuring boost you are measuring pressure in the manifold. If your heads and cams are doing a good job of getting hte air into the cylinder than you will see lower manifold pressures, all else being equal."

This seemed to make some sense...any comments?

Forgot to mention the other day, we also checked compression, 127-130 lbs at each cylinder. DR20 cams both timed and triple-checked to 2.4mm.